14 citations · 39 across the 3 of their papers we have counts for
7 papers
Inflation on a Slippery Slope
Ben Freivogel, Roberto Gobbetti, Enrico Pajer +1
We study inflation in a random multifield potential, using techniques developed by Marsh et al. The potential is a function of a large number of fields, and we choose parameters so…
On the Three Primordial Numbers
Roberto Gobbetti, Enrico Pajer, Diederik Roest
Cosmological observations have provided us with the measurement of just three numbers that characterize the very early universe: , and . Although each of…
D-brane scattering and annihilation
Guido D'Amico, Roberto Gobbetti, Matthew Kleban +1
We study the dynamics of parallel brane-brane and brane-antibrane scattering in string theory in flat spacetime, focusing on the pair production of open strings that stretch betwee…
Large-scale anomalies from primordial dissipation
Guido D'Amico, Roberto Gobbetti, Matthew Kleban +1
We analyze an inflationary model in which part of the power in density perturbations arises due to particle production. The amount of particle production is modulated by an auxilia…
Inflation from Flux Cascades
Guido D'Amico, Roberto Gobbetti, Matthew Kleban +1
When electric-type flux threads compact extra dimensions, a quantum nucleation event can break a flux line and initiate a cascade that unwinds many units of flux. Here, we present…
Unwinding Inflation
Guido D'Amico, Roberto Gobbetti, Matthew Kleban +1
Higher-form flux that extends in all 3+1 dimensions of spacetime is a source of positive vacuum energy that can drive meta-stable eternal inflation. If the flux also threads compac…